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Human bodies can become acclimatized, or used to, some levels of cold and heat.
If you visit someplace that’s hotter or more humid than you’re used to, you’ll feel uncomfortable at first. But after a week or so, your body will adjust. You’ll start to sweat more, and your temperature won’t rise as much when you exercise. Our bodies’ ability to adapt is one of the main reasons human beings can live in so many different climates.
